Rochelle Park and Pequannock police arrested four people Friday in connection with a suspected crack-cocaine-dealing operation based in Rochelle Park following a five-month joint investigation, authorities said.

Marisol Burgos, 42, of Rochelle Park is charged with numerous counts of narcotics possession, narcotics distribution, endangering the welfare of a child, and engaging a juvenile in the commision of a crime, Rochelle Park police said in a news release. Burgos was committed to the Morris County Jail in lieu of $50,000 bail.

Police believe Burgos delivered drugs from Rochelle Park to buyers outside the township, Rochelle Park Detective Jim DePreta said. "She was the main cog in the operation," he said.

Her boyfriend, Nelson Bonilla, 47, of Rochelle Park was arrested at the home he shares with Burgos and transported to the Bergen County Jail on multiple open arrest warrants. Additional charges against him are forthcoming, police said.

Two suspected buyers from Pequannock, Donna Deleo, 50, and Sean Ryan, 51, were charged with possession of narcotics and tampering with evidence.

The arrests followed months of surveillance and research and culminated Friday with the police departments following Burgos from Rochelle Park to Pequannock, police said. They interrupted her sale of crack cocaine to Deleo, who tried to throw the drugs out of the car window, police said. Juveniles were in the car during the sale, police said. Deleo's boyfriend, Ryan, was arrested at their Pequannock residence.

Police said they seized 24 baggies of crack cocaine, worth about $1,200, 15 bottles of prescription medication believed to be oxycodone/Endocet, baggies, bottles, and other packaging materials, as well as a small amount of marijuana and approximately $1,200 in cash through search warrants in Pequannock and Rochelle Park.

Police said the investigation is ongoing due to the large quantity and variety of the seized pills, which appeared to be packaged for sales.